I tried to find many papers finding a script of MPPT with shading , but i can't find it . Can you help me? to write this script? In those papers has only simulink

% MATLAB Script to plot PV I-V and P-V curves under normal and abnormal conditions
% Parameters for PV module (adjust as needed)
V_oc = 40;   % Open circuit voltage (V)
I_sc = 8;    % Short circuit current (A)
MPP_normal = [30, 6.5]; % Normal MPP [Voltage, Current]
MPP_abnormal = [20, 3]; % Abnormal MPP (e.g., shaded or faulty) [Voltage, Current]
% Generate Voltage vector
V = linspace(0, V_oc, 100);
% I-V curve for normal condition
I_normal = I_sc * (1 - V / V_oc);
I_normal(V > MPP_normal(1)) = MPP_normal(2);
% I-V curve for abnormal condition (e.g., shading or fault reduces current)
I_abnormal = I_sc * (1 - V / V_oc) * 0.5; % 50% reduction in current
I_abnormal(V > MPP_abnormal(1)) = MPP_abnormal(2);
% P-V curve for normal and abnormal conditions
P_normal = V .* I_normal;
P_abnormal = V .* I_abnormal;
% Plotting
figure;
% I-V Curves
subplot(2, 2, 1);
plot(V, I_normal, 'b', 'LineWidth', 1.5); hold on;
plot(MPP_normal(1), MPP_normal(2), 'bo', 'MarkerFaceColor', 'w');
xlabel('PV Voltage (V)');
ylabel('PV Current (A)');
title('I-V Curve (Normal)');
grid on;
subplot(2, 2, 2);
plot(V, I_abnormal, 'r--', 'LineWidth', 1.5); hold on;
plot(MPP_abnormal(1), MPP_abnormal(2), 'ro', 'MarkerFaceColor', 'w');
xlabel('PV Voltage (V)');
ylabel('PV Current (A)');
title('I-V Curve (Abnormal)');
grid on;
% P-V Curves
subplot(2, 2, 3);
plot(V, P_normal, 'b', 'LineWidth', 1.5); hold on;
plot(MPP_normal(1), MPP_normal(1) * MPP_normal(2), 'bo', 'MarkerFaceColor', 'w');
xlabel('PV Voltage (V)');
ylabel('PV Power (W)');
title('P-V Curve (Normal)');
grid on;
subplot(2, 2, 4);
plot(V, P_abnormal, 'r--', 'LineWidth', 1.5); hold on;
plot(MPP_abnormal(1), MPP_abnormal(1) * MPP_abnormal(2), 'ro', 'MarkerFaceColor', 'w');
xlabel('PV Voltage (V)');
ylabel('PV Power (W)');
title('P-V Curve (Abnormal)');
grid on;
sgtitle('PV Characteristics: Normal vs. Abnormal Conditions');

[Sandeep Mishra]

Hi @Prom

Could you clarify the question? You've shared a code snippet and output plots, but it's unclear what you're asking. The I-V and P-V curves differ from our studies. How should we determine the MPPT point?

Answer 1

[Sabin]

The question is unclear. I would advise to check this Simscape Electrical example as a starting point:

https://www.mathworks.com/help/sps/ug/solar-shading.html